Video superposition method, device and equipment based on FPGA (Field Programmable Gate Array) and medium

Abstract

The invention discloses a video superposition method, device and equipment based on an FPGA (Field Programmable Gate Array) and a medium, and the method comprises the steps: responding to video superposition parameters input by an external CPU (Central Processing Unit) or MCU (Microprogrammed Control Unit) through the FPGA, and collecting multiple pieces of video data to be superposed; pixel extraction is performed on the to-be-superposed video data according to the video superposition parameters, so that effective pixel data corresponding to the to-be-superposed video data can be obtained; writing the effective pixel data into a DDR (Double Data Rate); and when a video output synchronization signal is received, reading the effective pixel data from the DDR and superposing the effective pixel data according to the video superposing parameters to generate target superposing video data and outputting the target superposing video data. Therefore, the technical problems that according to an existing video overlapping scheme, all videos need to be cached to the DDR, the occupied DDR bandwidth is large, and the hardware cost is high are solved, effective pixel data extraction is carried out on the video data to be overlapped, the video data amount cached to the DDR is reduced, and then the bandwidth occupied by the DDR and the hardware cost are reduced.

Description

technical field [0001] The present invention relates to the technical field of video overlay, in particular to an FPGA-based video overlay method, device, equipment and medium. Background technique [0002] With the continuous development of video processing technology, the video overlay function has gradually become one of the commonly used functions of most video processing devices. [0003] The commonly used video overlay solutions in current video processing equipment are usually implemented on the basis of ASIC (Application Specific Integrated Circuit, Application Specific Integrated Circuit) and FPGA (Field Programmable Gate Array, Field Programmable Logic Gate Array). Among them, FPGA-based video processing equipment is more common. In order to realize arbitrary superimposition of multi-channel equipment, all videos input into the system are usually cached in DDR (Double Data Rate, double-rate synchronous dynamic random access memory) Among them, when video superposi...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an FPGA-based video overlay method, device, equipment and medium, which solves the technical problems that the video overlay scheme needs to cache all videos to DDR, occupies more DDR bandwidth, and has higher hardware costs

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